Error while building native application in Linux (ubuntu 10.04)

I am tring to build a native application using SenchaSDKTools-2.0.0-beta3-linux on ubuntu 10.04 platform. The tool working fine while generating application, creating model ,controller etc . except for building native application package which can generate the .apk file to make an android application using this tool. I am following the sencha command guide to run sencha package build and kept getting the error [ERROR] /bin/sh: stbuild: not found. I am attaching the screenshot regarding this error. I am clueless about this and also have checked the forum other developer facing the same problem previously without any solution.
Please some one provide any concrete solution to overcome this problem.